Back at 7:43, with the high-stake child support demands from jon cryer's ex-wife. She's having for nearly $90,000 a month for their 13-year-old son. That's more than ten-times what he usually pays. Abc's cecilia vega, with the story. Reporter: He plays the divorced check-writing dad on "two and a half men." But this morning jon cryer's real-life courtroom battle reads like a scene out of his hit tv show. I figured, while I was here, I would give you your last and final alimony check. Reporter: According to court documents, cryer's ex-wife, says since her custody of their 13-year-old son, jumped from 4% to 50%, her child support should go up, too. From $8,000 to nearly $90,000 a month. The out-of-work actress says she needs the money so their son can keep up with the rich kids in their neighborhood. What does he need? Suits, a cell phone, a cello, summer camp. In the court documents, she wants her son to have what classmates have. Exotic vacations to europe and thailand. Her argument is, oh, when they go to the mothers visiting a relative, with the weather, he's rich. But that's not a valid argument under the law. Reporter: The couple split in 2004. Cryer did not respond to our request for comment. And trigger said no comment. While neither is speaking publicly about this court fight, trigger claims in court documents while her acting career has stalled, cryer earns $2 million a month. Are you crying? I have allergies. Probably the dust from opening his wallet. Reporter: Now, it's up to a judge to decide if "two and a half men" can keep up with the joneses. For "good morning america," cecilia vega, abc news, los angeles. Sometimes it's hard to keep up with the joneses. Cryer, now remarried. And the couple has been an adapted daughter.

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